"""Support for Tile® Bluetooth trackers."""
from datetime import timedelta
import logging

from pytile import async_login
from pytile.errors import SessionExpiredError, TileError
import voluptuous as vol

from homeassistant.components.device_tracker import PLATFORM_SCHEMA
from homeassistant.const import CONF_MONITORED_VARIABLES, CONF_PASSWORD, CONF_USERNAME
from homeassistant.helpers import aiohttp_client, config_validation as cv
from homeassistant.helpers.event import async_track_time_interval
from homeassistant.util import slugify
from homeassistant.util.json import load_json, save_json

_LOGGER = logging.getLogger(__name__)
CLIENT_UUID_CONFIG_FILE = ".tile.conf"
DEVICE_TYPES = ["PHONE", "TILE"]

ATTR_ALTITUDE = "altitude"
ATTR_CONNECTION_STATE = "connection_state"
ATTR_IS_DEAD = "is_dead"
ATTR_IS_LOST = "is_lost"
ATTR_RING_STATE = "ring_state"
ATTR_VOIP_STATE = "voip_state"
ATTR_TILE_ID = "tile_identifier"
ATTR_TILE_NAME = "tile_name"

CONF_SHOW_INACTIVE = "show_inactive"

DEFAULT_ICON = "mdi:view-grid"
DEFAULT_SCAN_INTERVAL = timedelta(minutes=2)

PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
    {
        vol.Required(CONF_USERNAME): cv.string,
        vol.Required(CONF_PASSWORD): cv.string,
        vol.Optional(CONF_SHOW_INACTIVE, default=False): cv.boolean,
        vol.Optional(CONF_MONITORED_VARIABLES, default=DEVICE_TYPES): vol.All(
            cv.ensure_list, [vol.In(DEVICE_TYPES)]
        ),
    }
)


async def async_setup_scanner(hass, config, async_see, discovery_info=None):
    """Validate the configuration and return a Tile scanner."""
    websession = aiohttp_client.async_get_clientsession(hass)

    config_file = hass.config.path(
        ".{}{}".format(slugify(config[CONF_USERNAME]), CLIENT_UUID_CONFIG_FILE)
    )
    config_data = await hass.async_add_job(load_json, config_file)
    if config_data:
        client = await async_login(
            config[CONF_USERNAME],
            config[CONF_PASSWORD],
            websession,
            client_uuid=config_data["client_uuid"],
        )
    else:
        client = await async_login(
            config[CONF_USERNAME], config[CONF_PASSWORD], websession
        )

        config_data = {"client_uuid": client.client_uuid}
        await hass.async_add_job(save_json, config_file, config_data)

    scanner = TileScanner(
        client,
        hass,
        async_see,
        config[CONF_MONITORED_VARIABLES],
        config[CONF_SHOW_INACTIVE],
    )
    return await scanner.async_init()


class TileScanner:
    """Define an object to retrieve Tile data."""

    def __init__(self, client, hass, async_see, types, show_inactive):
        """Initialize."""
        self._async_see = async_see
        self._client = client
        self._hass = hass
        self._show_inactive = show_inactive
        self._types = types

    async def async_init(self):
        """Further initialize connection to the Tile servers."""
        try:
            await self._client.async_init()
        except TileError as err:
            _LOGGER.error("Unable to set up Tile scanner: %s", err)
            return False

        await self._async_update()

        async_track_time_interval(self._hass, self._async_update, DEFAULT_SCAN_INTERVAL)

        return True

    async def _async_update(self, now=None):
        """Update info from Tile."""
        try:
            await self._client.async_init()
            tiles = await self._client.tiles.all(
                whitelist=self._types, show_inactive=self._show_inactive
            )
        except SessionExpiredError:
            _LOGGER.info("Session expired; trying again shortly")
            return
        except TileError as err:
            _LOGGER.error("There was an error while updating: %s", err)
            return

        if not tiles:
            _LOGGER.warning("No Tiles found")
            return

        for tile in tiles:
            await self._async_see(
                dev_id="tile_{}".format(slugify(tile["tile_uuid"])),
                gps=(
                    tile["last_tile_state"]["latitude"],
                    tile["last_tile_state"]["longitude"],
                ),
                attributes={
                    ATTR_ALTITUDE: tile["last_tile_state"]["altitude"],
                    ATTR_CONNECTION_STATE: tile["last_tile_state"]["connection_state"],
                    ATTR_IS_DEAD: tile["is_dead"],
                    ATTR_IS_LOST: tile["last_tile_state"]["is_lost"],
                    ATTR_RING_STATE: tile["last_tile_state"]["ring_state"],
                    ATTR_VOIP_STATE: tile["last_tile_state"]["voip_state"],
                    ATTR_TILE_ID: tile["tile_uuid"],
                    ATTR_TILE_NAME: tile["name"],
                },
                icon=DEFAULT_ICON,
            )
